Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

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Updated:June 25, 2014

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Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

Contents

Introduction

System Requirements

Supported Device Hardware

Supported Optics

Supported FEX Modules

New and Changed Information

New Hardware Features in Cisco NX-OS Release 6.1(2)I2(3)

New Software Features in Cisco NX-OS Release 6.1(2)I2(3)

Installation Notes

Upgrade Instructions

Software Maintenance Upgrades

Limitations

Unsupported Features

VXLAN Features

VXLAN Topology Restrictions

VXLAN ACL Limitations

Open Caveats—Cisco NX-OS Release 6.1

Resolved Caveats—Cisco NX-OS Release 6.1(2)I2(3)

Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

Publication Date: June 23, 2014
Part Number: OL-31713-04 D0
Current Release: Release 6.1(2)I2(3)

This document describes the features, caveats, and limitations for Cisco NX-OS Release 6.1(2)I2(3) software for use on the Cisco Nexus 9000 Series switches. Use this document in combination with documents listed in the Related Documentation.

Table 1 shows the online change history for this document.

Table 1 Online History Change
Part Number	Revision	Date	Description
OL-31713-04	A0	June 23, 2014	Created the release notes for Release 6.1(2)I2(3).
	B0	July 29, 2014	Added a limitation about configuring a FEX with speed 100/full-duplex.
	C0	August 29, 2014	Added the “Software Maintenance Upgrades” section.
	D0	September 15, 2014	Removed N9K-X9636PQ from Table 2 and updated the “Limitations” section.
	E0	October 16, 2014	Updated hardware information for the Cisco Nexus 93128TX switch. Added a restriction to the “VXLAN Topology Restrictions” about FEX host interface ports used on VXLAN extended VLANs.
	F0	October 22, 2014	Added FEX section to “Unsupported Features”.
	G0	October 31, 2014	Added “Supported FEX Modules”.
	H0	February 19, 2015	Added NLB limitation in the “Limitations” section. Added bug ID CSCuq03168 to “Open Caveats—Cisco NX-OS Release 6.1”
	F0	February 23, 2015	Added a new line to explain a Cisco ALE port limitation in the “Limitations” section.
	G0	May 4, 2015	Added new limitations in “Limitations”.
	H0	January 11, 2015	Added link to ALE port limitations in “Limitations”.

This document includes the following sections:

Introduction

Cisco NX-OS software is a data center-class operating system designed for performance, resiliency, scalability, manageability, and programmability at its foundation. The Cisco NX-OS software provides a robust and comprehensive feature set that meets the requirements of virtualization and automation in mission-critical data center environments. The modular design of the Cisco NX-OS operating system makes zero-impact operations a reality and enables exceptional operational flexibility.

The Cisco Nexus 9000 Series uses an enhanced version of Cisco NX-OS software with a single binary image that supports every switch in the series, which simplifies image management.

System Requirements

This section includes the following topics:

Supported Device Hardware

Table 2 lists the Cisco Nexus 9000 Series hardware that Cisco NX-OS Release 6.1(2)I2(3) supports.

Table 2 Cisco Nexus 9000 Series Hardware
Product ID	Hardware	Quantity
N9K-C9508	Cisco Nexus 9508 8-slot chassis	1
N9K-C9508-FM	Cisco Nexus 9508 Series fabric module	6
N9K-C9508-FAN	Cisco Nexus 9508 fan trays	3
N9K-X9564PX	Cisco Nexus 9500 Series 48-port, 1-/10-Gbps SFP+ plus 4-port QSFP+ I/O module	Up to 8 in the Cisco Nexus 9508 Up to 4 in the Cisco Nexus 9504
N9K-X9564TX	Cisco Nexus 9500 Series 48-port, 1-/10-Gbps BASE-T plus 4-port QSFP+ I/O module	Up to 8 in the Cisco Nexus 9508 Up to 4 in the Cisco Nexus 9504
N9K-SC-A	Cisco Nexus 9500 Series System Controller Module	2
N9K-SUP-A	Cisco Nexus 9500 Series supervisor module	2
N9K-PAC-3000W-B	Cisco Nexus 9500 Series 3000 W AC power supply	Up to 6 in the Cisco Nexus 9508 Up to 4 in the Cisco Nexus 9504
N9K-C9504	Cisco Nexus 9504 4-slot chassis	1
N9K-C9504-FM	Cisco Nexus 9504 fabric module	6
N9K-C9504-FAN	Cisco Nexus 9504 fan trays	3
N9K-C9396PX	Cisco Nexus 9300 48-port, 1/10 Gigabit Ethernet SFP+ and 12-port, 40 Gigabit Ethernet QSPF switch	1
N9K-C93128TX	Cisco Nexus 9300 switch with 96 1-/10-Gigabit BASE-T ports and eight 40-Gigabit Ethernet QSPF ports (The 1-/10-Gigabit BASE-T ports also support a speed of 100 Megabits.)	1
N9K-M12PQ	Cisco Nexus 9300 uplink module, 12-port, 40 Gigabit Ethernet QSPF	1 (required)
N9K-PAC-650W¹	Cisco Nexus 9300 650 W AC power supply, hot air out (red)	2 or less
N9K-PAC-650W-B¹	Cisco Nexus 9300 650 W AC power supply, cold air in (blue)	2 or less
N9K-PAC-1200W²	Cisco Nexus 9300 1200 W AC power supply, hot air out (red)	2 or less
N9K-PAC-1200W-B²	Cisco Nexus 9300 1200 W AC power supply, cold air in (blue)	2 or less
N9K-C9300-FAN1¹	Cisco Nexus 9300 fan 1, hot air out (red)	3
N9K-C9300-FAN1-B¹	Cisco Nexus 9300 fan 1, cold air in (blue)	3
N9K-C9300-FAN2²	Cisco Nexus 9300 fan 2, hot air out (red)	3
N9K-C9300-FAN2-B²	Cisco Nexus 9300 fan 2, cold air in (blue)	3

^1.For use with the Cisco Nexus 9396 switch (N9K-C9396PX).

^2.For use with the Cisco Nexus 93128 switch (N9K-C93128TX).

For additional information about the supported hardware, see the Cisco Nexus 9508 Switch Site Preparation and Hardware Installation Guide, the Cisco Nexus 9504 Switch Site Preparation and Hardware Installation Guide, and the Cisco Nexus 9300 Series Switch Site Preparation and Hardware Installation Guide.

Supported Optics

Table 3 lists the supported optical components. For updated support information, also see the Compatibility Matrix.

Table 3 Transceivers and Cables
Product ID	Transceivers and Cables
FET-10G	FET-10G Fabric Extender transceiver module for MMF, 850-nm wavelength, dual LC/PC connector, 100-m reach with laser-optimized OM3 or OM4 multimode fiber Note This transceiver is supported only on fabric links from a Cisco Nexus 2000 to a Cisco parent switch.
QSFP-40G-SR4	40GBASE-SR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength, 12-fiber MPO/MTP connector
QSFP-40G-CSR4	40GBASE-CSR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength, 12-fiber MPO/MTP connector, 300-m reach with OM3 fiber
QSFP-40G-SR-BD	QSFP+ bidirectional transceiver module, duplex multimode fiber, LC duplex connector, 100-m reach with OM3 fiber
QSFP-40GE-LR4	40GBASE-LR4 QSFP+ 40G transceiver module for single mode fiber, 4 CWDM lanes in 1310-nm window muxed inside module, duplex LC connector, 10-km, 40G Ethernet rate only
QSFP-4x10G-AC7M	40GBASE-CR4 QSFP+ to four 10GBASE-CU SFP+ direct attach breakout cable assembly, 7 meter active
QSFP-4x10G-AC10M	40GBASE-CR4 QSFP+ to four 10GBASE-CU SFP+ direct attach breakout cable assembly, 10 meter active
QSFP-H40G-CU5M	40GBASE-CR4 QSFP+ direct-attach copper cable, 5 meter passive
QSFP-H40G-CU3M	40GBASE-CR4 QSFP+ direct-attach copper cable, 3 meter passive
QSFP-H40G-CU1M	40GBASE-CR4 QSFP+ direct-attach copper cable, 1 meter passive
QSFP-H40G-ACU7M	40GBASE-CR4 QSFP+ direct-attach copper cable, 7 meter active
QSFP-H40G-ACU10M	40GBASE-CR4 QSFP+ direct-attach copper cable, 10 meter active
SFP-10G-SR	10GBASE-SR SFP+ module
SFP-10G-LR	10GBASE-LR SFP+ module
SFP-H10GB-CU1M	10GBASE-CU SFP+ cable 1 meter
SFP-H10GB-CU3M	10GBASE-CU SFP+ cable 3 meter
SFP-H10GB-CU5M	10GBASE-CU SFP+ cable 5 meter
SFP-H10GB-ACU-7M	Active Twinax cable assembly, 7 meter
SFP-H10GB-ACU-10M	Active Twinax cable assembly, 10 meter
GLC-T	1000BASE-T SFP
GLC-SX-MM	GE SFP, LC connector SX transceiver
GLC-LH-SM	GE SFP, LC connector LX/LH transceiver

Note For the current release, if you are using the four 10G breakout cables with a Cisco Nexus 9000 Series switch, all ports on the I/O module must be set to breakout mode. A maximum of three l/O modules can be placed in breakout mode.

Supported FEX Modules

The following is a list of FEX modules the Cisco NX-OS Release 6.1(2)I2(3) supports with the Cisco Nexus 9396PX switch:

Cisco Nexus 2224TP
Cisco Nexus 2232PP
Cisco Nexus 2232TM
Cisco Nexus 2248TP and 2248TP-E
B22HP

New and Changed Information

This section lists the new and changed features in Release 6.1(2)I2(3), and includes the following topics:

New Hardware Features in Cisco NX-OS Release 6.1(2)I2(3)

The Cisco NX-OS Release 6.1(2)I2(3) supports the following Cisco Nexus Fabric Extender (FEX) modules in the Cisco Nexus 9396 switch:

N2224TP
N2248TP, N2248TP-E
N2232TM
N2232PP
B22HP

Each Cisco Nexus 9396 switch can support up to six FEXs in a straight-through topology. The FEXs can be used in Active/Standby and Active/Active modes and in a Host vPC.

New Software Features in Cisco NX-OS Release 6.1(2)I2(3)

There are no new software features in Cisco NX-OS Release 6.1(2)I2(3).

Installation Notes

Only one software image (called nx-os) is required to load the Cisco NX-OS operating system. This image runs on all Cisco Nexus 9000 Series switches. For installation instructions, see the Cisco Nexus 9000 Series NX-OS Software Upgrade and Downgrade Guide.

Upgrade Instructions

To perform a software upgrade, follow the installation instructions in the Cisco Nexus 9000 Series NX-OS Software Upgrade and Downgrade Guide.

Software Maintenance Upgrades

For information about software maintenance upgrades, see the “Performing Software Maintenance Upgrades” section in the Cisco Nexus 9000 Series NX-OS System Management Configuration Guide.

Note If you perform a software maintenance upgrade (SMU) and later upgrade your device to a new Cisco NX-OS software release, the new image will overwrite both the previous Cisco NX-OS release and the SMU package file.

Limitations

This section lists limitations related to Cisco NX-OS Release 6.1(2)I2(3).

When routed ACL is applied to multiple SVIs (switched virtual interfaces) in the EGRESS direction, TCAM resources are not shared.
The uplink module should not be removed from a Cisco 9300 switch that is running Cisco NX-OS Release 6.1(2)I2(3). The ports on the uplink module should be used only for uplinks.
The N9K-M12PQ GEM module front panel ports do not support Auto negotiation with copper cables. Manually configure the speed on the peer switch.
The PortLoopback and BootupPortLoopback tests are not supported.
The ASIC Memory-NS test is applicable only for the N9K-X9564PX and N9K-X9564TX line cards.
On the Cisco Nexus 9500 Series switches with the N9K-X9636TX line card, there is no support for PFC.
If you configure the FEX with speed 100/full-duplex and you do not explicitly configure the neighboring device with speed 100/full-duplex, the data packet traffic does not pass properly even though the link appears to be “up.”

– no speed: Autonegotiates and advertises all speeds (only full duplex).

– speed 100: Does not autonegotiate; pause cannot be advertised.The peer must be set to not autonegotiate (only 100 Mbps full duplex is supported).

– speed 1000: Autonegotiates and advertises pause (advertises only for 1000 Mbps full duplex).

Cisco NX-OS Release 6.1(2)I2(3) supports flooding for Microsoft Network Load Balancing (NLB) unicast mode on Cisco Nexus 9500 Series switches but not on Cisco Nexus 9300 Series switches. NLB is not supported in max-host system routing mode. NLB multicast mode is not supported on Cisco Nexus 9500 or 9300 Series switches.

Note To work around the situation of Unicast NLB limitation, we can statically hard code the ARP and MAC address pointing to the correct interface. Please refer to bug ID CSCuq03168 in detail in the “Open Caveats—Cisco NX-OS Release 6.1” section.

When routed ACL is applied to multiple SVIs (switched virtual interfaces) in the egress direction, TCAM resources are not shared.
When VACL (VLAN ACL) is applied to multiple VLANs, TCAM resources are not shared.
N9K hardware does not support range checks (layer 4 operators) in egress TCAM. Because of this, ACL/QoS policies with layer 4 operations-based classification need to be expanded to multiple entries in the egress TCAM. Egress TCAM space planning should take this limitation into account.
If the same QOS policy and ACL is applied on multiple interfaces, the label will be shared only when the qos-policy is applied with the no-stats option.
Limitations for ALE uplink ports are listed at the following URL:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/ale_ports/b_Limitations_for_ALE_Uplink_Ports_on_Cisco_Nexus_9000_Series_Switches.html

Unsupported Features

This section lists features that are not supported in the current release.

VXLAN Features

This section lists VXLAN features that are not supported.

VXLAN routing is not supported.

The default Layer 3 gateway for VXLAN VLANs should be provisioned on a different device.

Switch virtual interface (SVI) is not supported on VXLAN VLANs.
VXLAN Layer 3 uplinks are not supported on a nondefault virtual routing and forwarding (VRF) instance.
Switched Port Analyzer (SPAN) Tx for VXLAN traffic is not supported for the access to the network direction.
RACLs are not supported on Layer 3 uplinks for VXLAN traffic. Egress VACLs cannot be used on decapsulated packets in the network-to-access direction on the inner payload. As a best practice, use PACLs/VACLs for the access-to-network direction.
QoS classification is not supported for VXLAN traffic in the network-to-access direction.
The QoS buffer-boost feature is not applicable for VXLAN traffic.
Access control list (ACL) and quality of service (QoS) for VXLAN traffic in the network-to-access direction is not supported.
There is no uplink SVI support. As a best practice, use the Layer 3 port-channel uplinks/equal cost multi path (ECMP) uplinks instead.
There is no native VLAN support for VXLAN. All traffic on VXLAN Layer 2 trunks need to be tagged.
Consistency checkers are not supported for VXLAN tables.
Just one network virtualization edge (NVE) interface is allowed on the switch.
Because the NVE (VXLAN) process is not restartable, patching support is not supported for VXLAN.
Per-VNI statistics and per-VTEP statistics are not supported. Only aggregate statistics are available.
vPC type-1 consistency checkers are not supported for VXLAN configurations.
Dynamic re-IP of an NVE tunnel is not supported. Tunnels must be shut down prior to live IP address changes.

VXLAN Topology Restrictions

A device cannot be a VXLAN gateway mode (vxlan-vlan flows) and a VXLAN bridging mode (vxlan-vxlan flows) for the same multicast groups, which are also called the bud-node topology. As a best practice, use the device as either a bridging device or a gateway device, but not both.
Due to bud node restrictions, a VXLAN tunnel endpoint (VTEP) cannot reach the rendezvous point (RP) through another VTEP. Because of this limitation, there can be no direct Layer 3 links between two VTEPs, unless one of the VTEPs is the RP.
FEX host interface ports are not supported for VLANs extended with VXLAN.

VXLAN ACL Limitations

The following ACL related features are not supported:

Ingress router access control list (RACL) that is applied on an uplink Layer 3 interface that matches on the inner or outer payload in the network-to-access direction (decapsulated path)
Egress RACL that is applied on an uplink Layer 3 interface that matches on the inner or outer payload in the access-to-network direction (encapsulate path)
Egress VACL for decapsulated VXLAN traffic

We recommend that you use a port access control list (PACL)/VACL on the access side to filter out traffic entering the overlay network.

PVLANs

Private VLANs (PVLANs) are not supported.

DHCP

DHCP subnet broadcast is not supported.

FEX

FEX is supported only on the Cisco Nexus 9372PX and 9396PX switches. It is not supported on the other Cisco Nexus 9300 Series switches or the Cisco Nexus 9500 Series switches.

Caveats

This section includes the following topic:

Open Caveats—Cisco NX-OS Release 6.1

Table 4 lists the open caveats in the Cisco NX-OS Release 6.1(2)I2(3) release. Click the Bug ID to access the Bug Search tool and see additional information about the bug.

Table 4 Open Caveats in Cisco NX-OS Release 6.1(2)I2(3)
Bug ID	Description
CSCui54272	The Link Pause feature is not supported on the Cisco Nexus 9500 Series devices.
CSCuj51631	DHCP relay to a subnet broadcast address does not work.
CSCul18670	The show license usage command shows the incorrect license if a valid license is installed over an honor license.
CSCum32811	Multicast packets that are received on Layer 3 to VXLAN groups should not be sent to the CPU.
CSCum36233	The MAC address for the ToR switch does not match IP packets with the mac packet-classify feature.
CSCun00831	During the bootup of a peer switch, native-vlan mismatch syslog messages with CDP might appear.
CSCun01299	The show hardware capacity command should include MAC address table and route table information.
CSCun06345	A VXLAN vPC inconsistency is not detected with mismatched VXLAN configurations.
CSCun14773	Tagged packets in a non-VXLAN VLAN are encapsulated if the trunk port in a native VLAN is a VXLAN VLAN.
CSCun26726	HSRP packet decoding fails with an assertion error.
CSCun30078	After adding a new member to an uplink port channel, an error displays.
CSCun34856	All VLANs are suspended if one has a QoS policy but the TCAM is not configured.
CSCun69596	Unicast traffic still goes after out after the VNI configuration is removed.
CSCun69596	NS 40G access port drops cause packet flooding.
CSCun87017	NS 40G access port drops cause packet flooding.
CSCuo68827	Following a vPC peer reload, a synced MAC address is missing in hardware.
CSCuo86036	Spurious error messages appear when a MCT port-channel member is shut.
CSCup28117	The output of the show hardware capacity forwarding command for max-host-route entries is incorrect.
CSCup32728	An ACL or source VLAN on a SPAN session affects traffic on other sessions.
CSCup35239	The Ethanalyzer does not see packets that egress on a virtual interface.
CSCup36169	The show queuing interface command returns an error for an internal interface.
CSCup55774	No drop counters are displayed when a FEX HIF is congested.
CSCuq03168	Microsoft NLB traffic being routed into the destination VLAN is experiencing packet loss.

Resolved Caveats—Cisco NX-OS Release 6.1(2)I2(3)

Table 5 lists the resolved caveats in the Cisco NX-OS Release 6.1(2)I2(3) release. Click the Bug ID to access the Bug Search tool and see additional information about the bug.

Table 5 Resolved Caveats in Cisco NX-OS Release 6.1(2)I2(3)
Bug ID	Description
CSCug73220	Storm control counters are not working correctly on Cisco Nexus 9000 Series switches.
CSCuj57404	The DLB configuration should be rejected if PFC is configured.
CSCun06345	A VXLAN vPC inconsistency is not detected with mismatched VXLAN configurations.
CSCun26726	HSRP packet decoding fails with an assertion error.
CSCun30078	After adding a new member to an uplink port channel, an error displays.
CSCun34824	After entering the clear ip route command, VXLAN tunnels are not programmed correctly and traffic is silently dropped.
CSCun34856	All VLANs are suspended if one has a QoS policy but the TCAM is not configured.
CSCun69596	Unicast traffic still goes after out after the VNI configuration is removed.
CSCun76810	Configuring NTP on a Cisco Nexus 9000 Series switch causes a onep lost connection.
CSCuo25060	The IPv4/IPv6 forwarding for the VRF all consistency checker times out.
CSCuo34594	The Layer 2 MAC address consistency checker fails with multicast MAC addresses.

Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

Available Languages

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Bias-Free Language

Table of Contents

Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

Contents

Introduction

System Requirements

Supported Device Hardware

Supported Optics

Supported FEX Modules

New and Changed Information

New Hardware Features in Cisco NX-OS Release 6.1(2)I2(3)

New Software Features in Cisco NX-OS Release 6.1(2)I2(3)

Installation Notes

Upgrade Instructions

Software Maintenance Upgrades

Limitations

Unsupported Features

VXLAN Features

VXLAN Topology Restrictions

VXLAN ACL Limitations

PVLANs

DHCP

FEX

Caveats

Open Caveats—Cisco NX-OS Release 6.1

Resolved Caveats—Cisco NX-OS Release 6.1(2)I2(3)

Related Documentation

Configuration Guides

Other Software Documents

Hardware Documents

Release Notes

Documentation Feedback

Obtaining Documentation and Submitting a Service Request

This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/). This product includes software written by Tim Hudson (tjh@cryptsoft.com).

Cisco Nexus 9000 Series NX-OS Release Notes, Release 6.1(2)I2(3)

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